The Strict 45-Day Identification Race: Executing a Flawless 1031 Exchange

When you sell an investment property and plan to buy another, the calendar becomes your most important tool. A 1031 exchange can defer capital gains tax, but the 1031 exchange 45 day deadline is strict, and the IRS does not grant extensions for good intentions. Preparing before you list is the difference between a smooth exchange and an unexpected tax bill.

The Two Clocks That Start at Closing

A Section 1031 exchange has two statutory deadlines that begin on the day the sale of your relinquished property closes:

1. 45 days to identify potential replacement properties, in writing, to your qualified intermediary.
2. 180 days to close on the replacement property (or the due date of your tax return for that year, including extensions, if earlier).

Both clocks run on calendar days, and weekends and holidays count. For example, if your sale closes on March 1, the identification deadline falls on April 15 and the 180-day deadline falls on August 28. Because the 180-day period runs at the same time as the 45-day period, not after it, a delay in identifying properties shrinks your time to close.

Why a Qualified Intermediary Is Required

You cannot touch the sale proceeds during the exchange. A qualified intermediary (QI) holds the funds and prepares the exchange documents. We recommend engaging a QI, along with your CPA and attorney, before the relinquished property goes under contract. Taking receipt of proceeds, even briefly, can disqualify the exchange.

Identification Rules That Keep You Safe

The IRS gives investors three common ways to identify replacement property. Most investors rely on the first or second:

• Three-property rule: identify up to three properties of any value.
• 200% rule: identify more than three, as long as their combined value is no more than 200% of the value of what you sold.
• 95% rule: identify any number of properties, but you must acquire at least 95% of the total value identified.

Identification must be specific, in writing, signed, and delivered on time. Because a deal can fail, we suggest naming backup properties and vetting each one before the clock starts.

Debt Replacement and Equity

To defer all of the gain, you generally must buy replacement property of equal or greater value and replace the debt and equity you had in the old property. Here is an illustrative example. Suppose you sell for $2,000,000 and pay off an $800,000 loan. To fully defer, you would typically look for replacement property of at least $2,000,000 and place at least the same equity into it, or add cash or new debt to make up the difference. Any cash you receive, called boot, may be taxable. Your CPA can model the exact result.

A Commercial Up-Leg in Practice

Robert M. completed a commercial 1031 exchange, and Troy managed the up-leg, the purchase of the replacement commercial property. Our role in the up-leg combines the broker work of locating and negotiating the property with the lender work of lining up financing, so the closing could stay within the exchange deadlines. Because Troy is licensed as both a Broker and a mortgage loan originator, one team tracked the contract dates and the loan conditions together.

Build Your Timeline Backward

A practical checklist before you sell:

• Meet with your CPA to estimate the tax at stake.
• Engage a qualified intermediary before listing.
• Research replacement markets and lenders in advance.
• Confirm financing pre-approval for the replacement purchase.
• Mark day 45 and day 180 on every calendar.

Plan Before the Clock Starts

Investors who start early have more options and less pressure. To see how we think about preparation, timing, and pricing before a sale, download the 2026 Seller Playbook and bring your questions to your CPA and attorney.

This article is for educational purposes only and is not legal, tax, or financial advice. Rates, programs, and rules change; verify current details before acting.

Troy Huynh, Broker DRE #01889229 | NMLS #344740, Global Estate Hub LLC